Human codon usage

Different expression levels in different tissues.
Bob
"James Harper"
>> I'm looking for a suitable piece of software that I can enter my human
> coding sequence into and it will give me an idea of the possible
> expression level in humans by using a codon bias table and a suitable
> mathmatical formula. I've managed to find several programs for E.coli
> and yeast (e.g. Codon W) but nothing for humans.